JP4422994B2 - Grabber - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a gripper that can be suitably used for the purpose of gripping the tip of an elevator cable when the elevator cable is held in a pulled state mainly at the time of newly installing an elevator or performing maintenance and inspection. Is.

  Conventionally, when an elevator cable is newly installed when an elevator is newly installed, or when an elevator cable that has deteriorated during an elevator maintenance inspection is replaced, for example, at least one end of a stretchable bar-like tension device After connecting the wire gripper and gripping the tip of the elevator cable with the wire gripper, the tensioning device is reduced and the gripper is pulled down to bring the elevator cable into a stretched state. Things have been done.

  The gripper includes a fixed-side gripping part and a movable-side gripping part for gripping the elevator cable from above and below, and an elevator cable is provided on the opposing surfaces of the pair of gripping parts. A gripping groove is provided in each of which a portion close to a half of the outer peripheral surface is fitted. On the groove surfaces of these gripping grooves, anti-slip uneven portions are engraved in order to prevent the elevator cable from slipping out and securely gripping. The non-slip uneven portion has a sawtooth shape in cross section along the groove direction of the gripping groove. At present, twisted wires made up of a plurality of cable strands are generally used as elevator cables, and the individual cable strands twisted together are spirally twisted. Yes.

  However, the anti-slip uneven portions formed on the groove surfaces of the gripping grooves of the pair of gripping portions of the gripper have a large number of locking strips arranged in a direction perpendicular to the groove direction of the gripping grooves. Since the cross-sectional shape along the groove direction is serrated, when the elevator cable fitted in both gripping grooves is gripped from above and below by a pair of gripping sections, each locking strip However, when a large pulling force is applied to the tensioned elevator cable via the gripper, the tensile force is applied to each cable strand extending in a spiral shape. Corresponding to the force, the gripping force with respect to the elevator cable by the pair of gripping portions increases, and there is a risk that the respective locking strips will bite into the cable strands and damage the cable strands. Since the elevator cable lifts and lowers while supporting the elevator in a suspended state, it is preferable to avoid the occurrence of damage as described above.

  Therefore, for the purpose of preventing the elevator cable from being damaged even when the gripping force is increased due to the generation of a large pulling force, a gripping device having a pair of gripping portions whose lengths along the elevator cable are increased. By using the cable, it is conceivable that the cable is securely held while the holding force is not locally applied to the elevator cable when it is held. However, in that case, the entire shape of the gripper becomes extremely large, and the operability of the gripper is deteriorated. As a result, there is a new problem that the workability of the cable arrangement is lowered.

  The present invention has been made in view of the above-mentioned conventional problems, and does not cause an increase in shape and without damaging a linear body made of twisted lines with a plurality of strands. An object of the present invention is to provide a gripping device that can securely grip a linear body.

In order to achieve the above object, a gripping device according to a first aspect of the present invention is a gripping device main body having a fixed-side gripping portion, and is pivotally connected to the gripping device main body by a pulling means. an actuating member is applied the turning force in the direction, the is displaced by rotation in one direction of the actuating member in a direction coming close to the fixed-side掴線member, from twisted wire of the plurality of wires the becomes linear body with the stationary掴線member and a movable-side掴線member for gripping between them gripping grooves, 掴線portion of the movable掴線member and stationary掴線member at least gripping portion of movable lateral line掴線member of掴線portion, and the movable-side掴線member formed in the movable side掴線block of another member, the movable side掴線block body, the lower surface A mounting hole is formed at each end of the fitting recess, and a fixed hole is formed at the front center. A positioning state with respect to the movable side gripping member by fitting the upper part of the movable side gripping member into the fitting recess while engaging a pair of engagement pins fixed to the upper surface of the mounting hole, and the fixing It is characterized in that it is detachably attached to the movable side gripping member by insertion of the fixed metal fitting on the movable side gripping member into the hole with urging by a spring .

In the gripping device of the first aspect of the invention, each strand strip and each strand small groove are formed in an arrangement corresponding to each strand forming the outer peripheral surface of the linear body. When a large gripping force is applied to the linear body between the gripping portions, the gripping grooves of each gripping portion are located between two adjacent strands on the outer peripheral surface of the linear body. on not give damage in entering, Ru can operate effectively a uniform gripping force from the whole to the linear body at their gripping grooves of both掴線 portion. In particular, at least the gripping portion of the movable side gripping member is formed in a movable side gripping block body which is a separate member from the movable side gripping member, and the movable side gripping block body is a fitting recess on the lower surface. A mounting hole is formed at each of the both end side portions, a fixing hole is formed at the center of the front, and a pair of engaging pins fixed to the upper surface of the movable gripping member are fitted into the mounting hole while being engaged. By positioning the upper part of the movable gripping member in the recess, the positioning state with respect to the movable gripping member and the insertion into the fixing hole with the bias of the fixing bracket on the movable gripping member by the spring Since the movable side gripping member is detachably attached, maintenance can be performed with the movable side gripping block attached and detached .

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to FIGS. FIG. 1 is a front view showing a gripper according to an embodiment of the present invention. In this embodiment, a gripper having an elevator cable as a linear object to be gripped is illustrated. In FIG. 1, this gripper includes a gripper body 1 in which a mounting piece 3 and a support piece 4 are integrally extended downward from the left and right ends of the fixed side gripping part 2, and a substantially triangular shape. An operating lever member 7 having a shape and a triangular first corner portion 7a connected to the lower end portion of the mounting piece portion 3 via a pivot 8 so as to be rotatable, and a second of the operating lever member 7 The movable gripping member 9 is rotatably attached to the corner portion 7b via the connecting pin 10, and one end portion (the left end portion in the figure) is a third shaft of the operating lever member 7 via the support shaft 12. A connecting member 11 that is movably connected to the corner and is inserted into the insertion hole 4a of the support piece 4 is configured as a main component.

  At the other end (right end in the figure) of the connecting member 11, a connecting portion 11a to a pulling means described later is provided. Further, a torsion coil spring 16 is provided between the attachment piece 3 of the gripper body 1 and the operating lever member 7, and the actuating lever member 7 is opposed to the gripper body 1 with the pivot 8 as a fulcrum. It is arranged in a state of being urged to rotate in the direction of the arrow. That is, the torsion coil spring 16 is held in a state where the pivot 8 is inserted into the coil portion of the torsion coil spring 16 and both end portions 16a and 16b are the cover wall portion 3a of the attachment piece portion 3 of the gripper body 1 and the operating lever member. 7 are respectively locked in the locking holes 7d.

  A fixed-side grip block body 13 is detachably attached to the fixed-side grip portion 2, and a movable-side grip block body 14 is detachably attached to the movable-side grip member 9. That is, in this gripper, the portion for gripping and gripping the elevator cable from above and below is separated into separate members as a fixed-side gripping block body 13 and a movable-side gripping block body 14, and this fixed-side gripping device is separated. One of the features is that the wire block body 13 and the movable gripping block body 14 are detachably attached to the fixed gripping portion 2 and the movable gripping member 9. Further, both the gripping block bodies 13 and 14 are formed in a substantially prismatic bar shape using a linear metal to be gripped, that is, a soft metal whose hardness is lower than that of an elevator cable. In this embodiment, both gripping block bodies 13 and 14 are made of aluminum.

  The fixed-side gripping block body 13 is fixed to the fixed-side gripping wire by the two fixing pins 17 in a state where the fixed-side gripping portion 2 of the gripping portion main body 1 is fitted in the fitting recess 13a formed on the upper surface. It is fixed to the part 2. On the other hand, the movable side gripping block body 14 is fixed to the movable side gripping member 9 by the fixing bracket 18 in a state where the movable side gripping member 9 is fitted in the fitting recess 14a formed on the lower surface. However, details of the movable gripping block body 14 will be described later.

  FIG. 2 shows a left side view of the gripper. In the figure, the two fixing pins 17 are inserted into the gripper body 1 from the back side and engaged with the fixed side gripping block body 13 to grip the fixed side gripping block body 13. It is fixed to the wire body 1. Grip grooves 19 and 20 having a substantially semicircular cross section are formed in the opposing surfaces of the gripping block bodies 13 and 14, respectively. The gripping block bodies 13 and 14 hold the elevator cables so as to be sandwiched from above and below in a state where the elevator cables are fitted in the gripping grooves 19 and 20. Therefore, both the grip grooves 19 and 20 are formed in a substantially semicircular shape corresponding to the outer diameter of the elevator cable to be gripped. In addition, a large number of strand strips, which will be described later, are formed on the groove surfaces of both gripping grooves 19 and 20.

  3A and 3B show the movable gripping block body 14, wherein FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a right side view. As shown in (a), the gripping grooves 20 of the movable side gripping block body 14 are arranged in a number corresponding to the shape of the outer peripheral surface of the elevator cable, which is a linear body to be gripped in this embodiment. The strand strip portion 20a is formed, and a strand small groove portion 20b is formed between two adjacent strand strip portions 20a.

  That is, as shown in FIG. 5 (b), the elevator cable 22 is formed of a twisted wire having a plurality of cable strands 22a, so that the individual cable strands 22a are twisted in a spiral shape. It has become. Therefore, the strand strip portion 20a and the strand small groove portion 20b are formed in a shape corresponding to a part of each spiral shape of each cable wire 22a forming the outer peripheral surface of the elevator cable 22. Further, as shown in FIG. 5B, the strand groove 19 a and the strand small groove 19 having substantially the same shape as the movable gripping block body 14 are also formed in the gripping groove 20 of the fixed gripping block body 13. Has been.

  As shown in FIGS. 3 (b) and 3 (c), the movable gripping block body 14 has mounting holes 14b formed at both ends of a fitting recess 14a formed on the lower surface. A fixing hole 14c is formed in the front center portion. The movable gripping block body 14 is inserted into the fitting recess 14a while engaging a pair of engagement pins 21 and 21 (FIG. 1) fixed to the upper surface of the movable gripping member 9 into the mounting holes 14b. By fitting the upper part of the movable gripping member 9, the movable gripping member 9 is fixed in a positioning state, and the fixed bracket 18 (FIG. 1) is inserted into the fixed hole 14 c, thereby moving the movable gripping member 9. It is prevented from coming off the gripping member 9. Next, the fixing bracket 18 will be described.

  As shown in FIGS. 6A and 6B, the fixing bracket 18 is formed in a substantially U-shape by bending two portions of the shaft-shaped member at right angles in the same direction. From both ends of the portion 18a, a fixed shaft portion 18b that engages with the fixed hole 14c of the movable gripping block body 14 and an insertion hole 9a formed on one side of the bifurcated shape of the movable gripping member 9 are inserted. The mounting shaft portion 18c extends. A locking ring 23 is fitted and fixed to the distal end portion of the mounting shaft portion 18c. A holding hole 9b into which the locking ring 23 is slidably fitted is formed in the other side of the bifurcated shape of the movable gripping member 9. The fixing metal 18 is wound around the mounting shaft 18c in a direction in which the fixed shaft 18b is inserted into the fixing hole 14c by the compression coil spring 24 interposed between the locking ring 23 and the insertion hole 9a. Always energized.

  Next, the operation of the gripper will be described. In the normal state of FIG. 1, the actuating lever member 7 is operated to rotate against the rotational biasing force of the torsion coil spring 16, and the gripper body 1 is shown in FIG. Turn in the direction of the arrow. As a result, as shown in FIG. 4, the movable gripping member 9 is displaced downward as the operating lever member 7 rotates, and the movable gripping block body 14 is separated from the fixed gripping block body 13. .

  While maintaining the above state, as shown in FIG. 4, when the elevator cable 22 is inserted between the two gripping block bodies 13 and 14 that are separated from each other, and then the holding of the operating lever member 7 is released, the operation is performed. The lever member 7 is rotated in the direction of the arrow in FIG. 5 by the rotational biasing force of the torsion coil spring 16 to push the connecting member 11 in the direction of the arrow in the same figure. At this time, since the movable gripping member 9 is pushed upward in the drawing as the operation lever member 7 rotates, as shown in FIG. With the elevator cable 22 fitted in the gripping grooves 19 and 20, the elevator cable 22 is sandwiched from above and below and held. As a result, the gripper is securely temporarily attached to the elevator cable 22 by the rotational biasing force of the torsion coil spring 16.

  When the gripper 1 is temporarily attached to the elevator cable 22, a gripping force due to the rotational biasing force of the torsion coil spring 16 acts between the gripping block bodies 13 and 14. Therefore, as shown in FIG. 5 (b), the strand strips 19a and 20a of the gripping block bodies 13 and 14 enter between the two adjacent cable strands 22a and the gripping block. The cable strands 22a enter the stride small grooves 19b and 20b of the bodies 13 and 14, respectively.

  After that, pulling means such as a wire drawing device connected to the connecting portion 11a of the connecting member 11 is operated to pull the connecting member 11 in the direction of the arrow in FIG. At this time, since the rotation biasing force corresponding to the pulling force applied to the connecting member 11 acts on the operating lever member 7, the operating lever member 7 is rotated in the direction of the arrow in FIG. As a result, the movable gripping member 9 attached to the actuating lever member 7 is pushed upward slightly in the oblique direction, so that the gripping force to the elevator cable 22 by the gripping block bodies 13 and 14 is increased. Increases and the elevator cable 22 is firmly held.

  In the conventional gripping device, a number of locking strips are arranged in the direction perpendicular to the groove direction of the gripping groove on the groove surface of the gripping groove of each of the gripping portions on the fixed side and the movable side. Since the non-slip uneven portion having a serrated cross-sectional shape is formed, and the respective locking strips are opposed to each other in a relative arrangement orthogonal to each cable element extending in a spiral shape, When a large gripping force is applied between the pair of gripping portions, there is a problem in that each locking strip portion bites into the cable strand.

  On the other hand, in the above gripping device, a large number of the gripping block bodies 13 and 14 are arranged so as to form a part of a spiral shape corresponding to each cable strand 22a that forms the outer peripheral surface of the elevator cable 22. The strand strip portion 20a is formed, and a strand small groove portion 20b is formed between two adjacent strand strip portions 20a. Therefore, when a large gripping force is applied between the both gripping block bodies 13 and 14, as described above, the strand strips 19a and 20a of the both gripping block bodies 13 and 14 are adjacent to each other. The cable strands 22a enter between the cable strands 22a and the stride small grooves 19b and 20b of the gripping block bodies 13 and 14. Both gripping block bodies 13 and 14 are made of aluminum which is a softer metal than the cable strand 22a. As a result, in this wire gripper, there is no possibility that the strand strips 19a and 20a bite into the cable strand 22a and cause damage.

  And since each strand strip part 19a, 20a and each stride small groove part 19b, 20b are formed by arrangement | positioning corresponding to each cable strand 22a which forms the outer peripheral surface of the cable 22 for elevators, Even if the size is comparable, an effective anti-slip function is exhibited for the elevator cable 22. Therefore, the gripping block bodies 13 and 14 can apply a gripping force evenly to the elevator cable 22 from the entire gripping grooves 19 and 20, so that the elevator cable 22 is securely held in a state of being prevented from coming off. Can be grabbed. Therefore, in the above embodiment, the case where the strand strip portions 19a, 20a and the stride small groove portions 19b, 20b are formed over the entire gripping grooves 19, 20 is illustrated, but only in a part of the gripping grooves 19, 20 Even if only the strand strips 19a and 20a and the stride small grooves 19b and 20b are formed, substantially the same effect as described above can be obtained.

  Further, since both gripping blocks 13 and 14 are made of ermium which is a softer metal than the elevator cable 22, in addition to obtaining the effect of not damaging the elevator cable 22, the strand There is an advantage that the strip portions 19a and 20a and the stride small groove portions 19b and 20b can be easily formed into a shape that accurately corresponds to the shape of the outer peripheral surface of the elevator cable 22.

  By the way, there are seven types of current elevator cables 22 with different outer diameters. When these elevator cables 22 are twisted into a spiral of the cable strand 22a according to the difference in outer diameters, The inclination angle, that is, the strand pitch is different. On the other hand, the gripping device includes a fixed gripping block body 13 and a movable gripping block body 14 that are detachably attached to the fixed gripping portion 2 and the movable gripping member 9, respectively. Therefore, the fixed side gripping block 13 and the movable side, in which the strand strips 19a and 20a and the stride small grooves 19b and 20b corresponding to the different types of elevator cables 22 are formed in the gripping grooves 19 and 20, respectively. The gripping block body 14 is prepared for each type of elevator cable 22.

  Then, the fixed side gripping block body 13 and the movable side gripping block body 14 prepared as described above are appropriately exchanged and attached according to the elevator cable 22 to be gripped. In that case, when exchanging the movable gripping block body 14, the fixed shaft 18 b is moved as shown in FIG. 6B by grasping the operation portion 18 a of the fixture 18 in the attached state of FIG. After pulling out from the fixing hole 14c of the side gripping bushing body 14, by rotating the operation portion 18a, the fixed shaft portion 18b is separated from the fixing hole 14c and contacts the side surface of the movable side gripping member 9. Then, the finger is released from the operation unit 18a. As a result, the movable side gripping block body 14 is released from being prevented from being detached from the movable side gripping member.

  Subsequently, the actuating lever member 7 is rotated with respect to the gripper body 1 in the direction of the arrow in FIG. 1 to move the movable side gripping block body 14 away from the fixed side gripping block body 13 and maintain this state. However, as shown by a two-dot chain line in FIG. 6 (b), the movable gripping block body 14 is removed from the pair of engagement pins 21 of the movable gripping member 9 and removed. Next, the movable gripping block body 14 to be attached is engaged with the engaging pin 21 in the mounting hole 14b and fitted to the movable gripping member 9 in a positioning state, and then the fixing bracket 18 is operated. When the operation 18a is released when the fixed shaft 18b is aligned with the fixed hole 14c by performing the rotation operation in the opposite direction to the above by picking the portion 18a, the compressed compression spring 24 is compressed. Due to this restoring force, the fixed shaft portion 18b is engaged in the fixed hole 14c, and the movable side gripping block body 14 is fixed to the movable side gripping member 9 in a retaining state. Therefore, this gripper can perform the replacement | exchange operation | work of the movable side grip block body 14 easily and rapidly.

  On the other hand, the fixed-side grasping block body 13 can be detached from the fixed-side grasping part 2 by removing the pair of fixing pins 17 from the fixed-side grasping part 2. Next, the fixed-side grip block body 13 to be attached is fitted into the fixed-side grip portion 2 and then a new engagement pin 17 is press-fitted into the fixed-side grip portion 2 to thereby fix the fixed-side grip block portion 13. It is attached from the line part 2. The fixed-side gripping block body 13 can be mounted with the same mounting structure as the movable-side gripping block body 14, and in this case, the replacement work of the fixed-side gripping block body 13 is easy. And can be done quickly.

  However, since the slippage of the elevator cable 22 is mainly performed in the strand strip portion 20a and the strand small groove portion 20b of the movable side grip block body 14, all the grip grooves 19 of the fixed side grip block body 13 The required effect can be obtained simply by forming the strand strip 19a and the strand small groove 19b having a relatively simple shape that can be shared by the type of elevator cable 22. In that case, Regardless of the type of cable 22 used, there is no need to replace the stationary gripping block 13.

  In addition, although the thing for holding the elevator cable 22 was illustrated and demonstrated in the said embodiment, the grasping device of this invention is not restricted to the use for holding the cable 22 for elevators. Also, it can be used for the purpose of gripping other linear bodies such as electric wires made of a plurality of strands of strands.

The front view of the unused state of the gripper which concerns on one embodiment of this invention. The left view which shows a gripper same as the above. The movable side grasping block body in a grasping device same as the above is shown, (a) is a top view, (b) is a front view, (c) is a right side view. The front view of the state before the attachment to the linear body of a gripper same as the above. (A) is the left view of the state attached to the linear body of the gripper same as the above, (b) is the expanded sectional view which showed the principal part of (a) in detail. (A) is the sectional view on the AA line of FIG. 1, (b) is sectional drawing of the state which removed the movable side grasping block body from the state of (a).

Explanation of symbols

1 Grabber body
2 Fixed side grip
7 Actuation lever member (actuation member)
9 Movable gripping member (movable gripping part)
13 Fixed gripping block
14 Movable gripping block body 19, 20 Grip groove 19a, 20a Strand strip 19b, 20b Strand small groove
22 Elevator cable (linear body)
22a Cable wire (wire)

Claims (1)

A gripper body having a fixed gripping portion;
An actuating member rotatably connected to the gripper body and provided with a turning force in one direction by a pulling means;
Is displaced in a direction closer to the rotation in one direction of the actuating member relative to said stationary掴線member, with a linear body comprising a twisted wire of a plurality of wires the stationary掴線member and a movable-side掴線member for gripping between them gripping grooves,
At least the gripping portions of the movable side wire掴線member of掴線portion of 掴線portion and a fixed-side掴線member of the movable掴線member is movable掴of a member separate from the movable-side掴線member Formed in a wire block body,
The movable side gripping block body is fixed to the upper surface of the movable side gripping member with mounting holes formed at both ends of the fitting recess on the lower surface, and a fixing hole formed at the front center. By positioning the upper part of the movable gripping member in the fitting recess while engaging the pair of engagement pins into the mounting hole, the positioning state with respect to the movable gripping member and the movable gripping to the fixed hole A gripping device, wherein the gripping device is detachably attached to the movable gripping member by insertion of a fixed metal fitting on the wire member with urging by a spring .

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